To exercise equipment

ABSTRACT

A control system for controlling one or more of a plurality of exercise apparatuses across a network comprises a processor; a communication subsystem configured to communication with the plurality of exercise apparatuses across the network; and memory for storing information about one or more users. The information comprises, for each user, identity information, including a user identifier; and a resistance level indicator. Upon receipt of a user identifier from an exercise apparatus in the network, the processor is configured to identify the resistance level indicator stored in the memory corresponding to the user identifier, and cause the communication subsystem to transmit to the exercise apparatus the resistance level indicator for that user. Upon receipt of a performance parameter of a user from an exercise apparatus in the network, the processor determines whether to modify the resistance level indicator of that user based on the received performance parameter.

FIELD

The invention generally relates to exercise apparatus and controlsystems thereof, and more particular to exercise equipment whichfacilitate the optimisation of exercise protocols performed on exerciseapparatus.

BACKGROUND

High Intensity Training (HIT) is a form of exercise that has been provenin clinical trials to deliver the same, if not superior, benefits astraditional aerobic endurance exercise (such as jogging, walking,running, cycling) but in a shorter time. Some of the health benefits ofHIT are improved cardiovascular fitness and improved sugar metabolism(better response to insulin and reduced risk of diabetes). The improvedresponsiveness of body cells to insulin also helps mobilising the body'sfat stores when trying to lose weight.

HIT involves doing a small number of short intervals of exercise at veryhigh intensity, which go beyond an individual's capacity to transportand use oxygen during exercise (i.e., VO₂max). For example, one HITprotocol consists of 3 minutes light warm-up cycling on an exercise bikeat low resistance; followed by a 20 seconds sprint at high resistancefor the exerciser to achieve maximal power output during the sprint;followed by a 3 minutes recovery period of slow cycling at lowresistance; followed by a second high-intensity 20 seconds sprint athigh resistance; followed by a 3 minutes cool-down period of slowcycling at low resistance. This protocol of under 10 minutes perexercise session performed 3 times per week has been scientificallyproven under laboratory conditions to deliver the same benefits in termsof cardiovascular fitness (VO₂max) and sugar metabolism (insulinsensitivity) as four runs of 45 minutes each per week. Of course, theprotocol may be varied in the number and duration of low resistanceperiods, and in the number and duration of peak performance protocols.

HIT is a well-established training method that has been known for sometime. If the HIT exercise is carried our correctly, it represents a veryeffective and convenient workout in which users do not or only minimallysweat, which would allow the exercise to be carried out for, forexample, at work without the need for changing clothes or having ashower.

However, there are currently no pieces of exercise apparatus on themarket that have been specifically designed for HIT. For example,existing exercise bicycles are general purpose for multiple differentkinds of exercise, and resistance levels thus need to be manuallyadjusted by the user, distracting the user from the focussed nature ofthe HIT workout. A range of different types of exercise apparatus areavailable for use in dedicated gyms, or at home, and some have beendeveloped to include sophisticated control systems. For example, manygyms offer upright and reclining bikes, which are used for comparativelylow intensity exercise. Many such bikes include pre-set programs, whicha user may select to adjust resistance of the exercise over a period oftime. These exercise bikes are not adapted to provide HIT exercise. If auser were to attempt to perform an HIT workout on existing bikes, theywould have to input the resistance values for the workout themselves,with no guidance as to a correct value to choose.

To correctly carry out an HIT protocol, the user must exercise at veryhigh intensity when required, and recover when required by exercising atlow intensity. This is unfamiliar to many users, so, without apparatusspecifically designed for HIT, it is likely that the user will notfollow the HIT protocol correctly and not experience the full benefit ofthis form of exercise.

A user should be working at or near their maximum power output tocorrectly perform an HIT protocol; however it is known that maximumpower output is not necessarily achieved at maximum resistance. In thisregard, one significant problem which arises using standard exercisebikes is that many users perform the HIT protocol with too high or toolow resistance levels, or with too high or too low cadence. Cadence isthe rate of revolutions of the crank, i.e. the rate at which the cyclistis turning the pedals. It is particularly inconvenient for a user toadjust the resistance level manually, as this interrupts the user'sexercise. It is also not advisable for the user to set their resistancelevel themselves, as this gives an additional distraction to the user.Furthermore, the user does not know what resistance level to choose, howto optimise their resistance level, and whether or not their resistancelevel should be changed depending on their performance. This uncertaintymakes it difficult for a user to correctly carry out an HIT protocol oncurrent exercise apparatus.

Another problem particularly associated with the difficult and intensenature of an HIT protocol is the motivation of the user. Enthusiasm andwillpower are required to work at or near maximum intensity and poweroutput. If the user is given the option to set their own resistancelevel they may start with too high a resistance, and then give up, orlower the level too far to give an easier workout, and thus not followthe protocol correctly. This is another reason to prevent the user fromadjusting their resistance level.

Accordingly, there is a need for exercise apparatus that is specificallydesigned to make it easier for a user to correctly carry out an HITprotocol. This should involve minimal input from the user, andautomatically optimise resistance levels such that the user is workingat the correct intensity. If the input of the user at the start of eachHIT protocol is minimised, the user will be more focussed on theprotocol, and will therefore be more able to meet its particularexacting requirements, and thus see the full benefit of this form ofexercise.

In addition, a problem associated with standard exercise apparatus isthat it is unsuitable for use in public, or private areas other thangyms, such as office buildings, retail outlets, hotels, and so on. Ifconventional exercise apparatus was placed in public areas withoutsupervision, there would be a significant risk of unauthorised andinappropriate use, which may put the user at risk of injury due toincorrect operation, overexertion, and so on. Furthermore, users mayfeel uncomfortable exercising on conventional bikes in public areas,particularly at peak performance levels, because they would feed exposedand would lack a minimum required level of privacy.

Health clubs and gyms normally offer a range of exercise bikes toconduct aerobic fitness exercises. However, this means that the exercisebikes are occupied by one individual user for a relatively long periodof time. This makes it necessary to provide a greater number of piecesof expensive apparatus that occupy a larger floor space. Moreover,exercise bikes and other pieces of exercise equipment found in gyms arenot specifically designed for HIT, and thus suffer the problemsdescribed above.

SUMMARY OF THE INVENTION

Accordingly, in a first aspect, the present invention provides a controlsystem for controlling one or more of a plurality of exerciseapparatuses across a network, each of the plurality of exerciseapparatuses being configured to transmit a user identifier and aperformance parameter of a user, the control system comprising:

-   -   a processor;    -   a communication subsystem configured to communication with the        plurality of exercise apparatuses across the network; and    -   memory for storing information about one or more users, the        information comprising, for each user:        -   identity information, including a user identifier; and        -   a resistance level indicator;    -   wherein upon receipt of a user identifier from an exercise        apparatus in the network, the processor is configured to        identify the resistance level indicator stored in the memory        corresponding to the user identifier, and cause the        communication subsystem to transmit to the exercise apparatus        the resistance level indicator for that user; and    -   wherein upon receipt of a performance parameter of a user from        an exercise apparatus in the network, the processor is        configured to determine whether or not to modify the resistance        level indicator of that user stored in the memory based on the        received performance parameter.

The invention allows users to carry out a training session on a piece ofexercise apparatus (such as an exercise bike) and follow ascientifically proven HIT protocol which is algorithmically optimisedbased on a measured performance parameter of the user. For the purposesof this description, a HIT protocol is a programme of activity definedby one or more periods in which the user exercises at high intensityagainst a particular resistance for a particular duration. The HITprotocol is chosen by the processing means based on biometric userinformation which is entered by or gleaned from the user, and isalgorithmically optimised based on a measured performance parameter ofthe user performing the HIT protocol.

Further, this invention enables a piece of exercise apparatus (such asan exercise bike) to be situated outside of the conventional gymenvironment, such as in a public or private area (e.g., officebuildings, retail outlets, gyms, or at home) and also to be operatedsafely unsupervised.

The control system allows for the provision of a plurality ofapparatuses distributed across a building, town or country which arecentrally controlled such that a user can use the apparatus at his orher convenience. The system associates a resistance level indicator witha user identifier, such that upon receipt of a user identifier (forexample, when a user provides a unique access key or username andpassword specific to the user), the system is able to return theresistance level associated with that user. This can take place on anyapparatus in the distributed network which is capable of communicatingwith the control system.

The resistance level indicator is used to set the resistance level ofthe apparatus used by the user. During exercise at that resistancelevel, the apparatus provides a performance parameter to the controlsystem. This performance parameter reflects the performance of the userexercising at that resistance level. Upon receipt of the performanceparameter, the control system determines whether or not to adjust theresistance level indicator of that user. If the performance parameterindicates that the user is performing the protocol too easily at a givenresistance, the control system may determine that the resistance levelindicator should be increased, and vice versa. Thus, the resistancelevel will be optimised for each individual user.

In a second aspect of the invention, the present invention provides anexercise apparatus configured to communicate with a remote server acrossa network, the remote server being configured to transmit a resistancelevel indicator indicative of a resistance level to be applied by theexercise apparatus, the exercise apparatus comprising:

-   -   a processor;    -   a communications subsystem configured to communicate with the        remote server across the network;    -   an identification subsystem configured to receive a user        identifier from a user;    -   a load for use in exercise and a brake for applying resistance        to the load; and    -   a measurement subsystem configured to measure a performance        parameter of the user on the apparatus;    -   wherein upon receipt of a user identifier from a user, the        processor is configured to cause the communication subsystem to        transmit the user identifier to the remote server across the        network;    -   wherein upon receipt of a resistance level indicator from the        remote server, the processor is configured to cause the brake to        apply a corresponding resistance to the load; and    -   wherein upon measurement of a performance parameter of the user        on the apparatus, the processor is configured to cause the        communication subsystem to transmit to the remote server the        performance parameter of that user.

For instance, one or more pieces of exercise apparatus according to thesecond aspect of the invention may be usable with the control system ofthe first in a distributed network.

It will be appreciated that the apparatus is able to receive a useridentifier (such as a unique access key or username and passwordspecific to the user) from the user, and transmit that identifier to thecontrol system for use in retrieving the associated resistance levelindication. The apparatus also provides a load movable by the usercarrying out the exercise, and a brake which prevents the load frombeing moved, thereby offering resistance against the user's exercise.The resistance applied by the brake is dependent on the resistance levelindicator received from the control system.

A third aspect of the invention provides an exercise apparatuscomprising:

-   -   a processor;    -   a load for use in exercise and a brake for applying resistance        to the load;    -   a measurement subsystem configured to measure a performance        parameter of the user on the apparatus; and    -   a data interrogation subsystem configured to access a memory for        storing information about one or more users, the information        comprising, for each user:        -   a resistance level indicator; and    -   wherein the processor is configured to cause the data        interrogation subsystem to identify the resistance level        indicator stored in the memory, and cause the brake to apply a        corresponding resistance to the load; and    -   wherein upon measurement of the performance parameter of the        user on the apparatus, the processor is configured to determine        whether or not to cause the data interrogation subsystem to        modify the resistance level indicator of that user stored in the        memory based on the measured performance parameter.

Thus, instead of distributing the system across a network, the inventioncould be practiced on one or more ‘standalone’ apparatuses, each ofwhich is capable of accessing a resistance level indicator for a user,applying resistance corresponding to that indicator to a load (again,using a brake acting on the load), measuring a performance parameter ofthe user and based on the measured performance parameter, anddetermining whether or not to adjust the resistance level indicator.

In this case, the resistance level indicator could be stored in a memoryon the apparatus (in which case, a user identifier may be necessary forretrieving the correct resistance level indicator), or the indicatorcould be stored in a device supplied by the user (such as a fob orsmartphone), in which case no such user identifier would be necessary.

Hence, in a preferred implementation of the third aspect of theinvention, the apparatus further comprises an identification subsystemconfigured to receive a user identifier from a user;

-   -   wherein the information about one or more users further        comprises, for each user, identity information including a user        identifier; and    -   wherein upon receipt of a user identifier from the user, the        processor is configured to cause the data interrogation        subsystem to identify the resistance level indicator stored in        the memory corresponding to the user identifier.

This enables a plurality of users to use the same bike, each of whomcould access their own resistance level indicator stored locally on themachine, and thus remove the need to carry a device supplied by theuser.

Further optional features of the first to third aspects of the inventionare given below. Methods corresponding to the first to third aspects arealso contemplated.

In particular, in a fourth aspect of the invention, there is providedmethod for controlling one or more of a plurality of exerciseapparatuses across a network, the method comprising:

-   -   receiving a user identifier from an exercise apparatus;    -   retrieving a resistance level indicator corresponding to the        user identifier from a memory;    -   transmitting the resistance level indicator to the exercise        apparatus;    -   receiving a performance parameter from the exercise apparatus;    -   determining, based on the received performance parameter,        whether or not to modify the resistance level indicator; and, if        the determination is positive:    -   modifying the resistance level indicator corresponding to the        user identifier in the memory.

In a fifth aspect of the invention, there is provided a method ofcontrolling an exercise apparatus comprising:

-   -   receiving a user identifier from a user;    -   transmitting the user identifier to a remote server across a        network;    -   receiving a resistance level indicator from the remote server;    -   applying resistance to a load for use in exercise by causing a        brake to apply a resistance corresponding to the received        resistance level indicator to the load;    -   measuring a performance parameter of the user on the apparatus;        and        transmitting the measured performance parameter to the remote        server

In a sixth aspect of the invention there is provided a method ofcontrolling an exercise apparatus, the method comprising:

-   -   accessing from a memory a resistance level indicator of the        user;    -   applying resistance to a load for use in exercise by causing a        brake to apply a resistance corresponding to the retrieved        resistance level indicator to the load;    -   measuring a performance parameter of the user on the apparatus;    -   determining whether or not to modify the resistance level        indicator of that user based on the measured performance        parameter; and, if the determination is positive:    -   modifying the resistance level indicator in the memory.

Optional features for the fourth to sixth aspects of the inventioncorrespond to the optional features of the first to third aspects, asdescribed below.

Preferably, the information about one or more users further comprises,for each user, biometric information; and

-   -   wherein the processor is further configured to set the        resistance level indicator of the user based on the user's        biometric information.

Hence, in situations where it is inappropriate or impossible for thesystem or bike to modify an existing resistance level indicator (forinstance, because one does not exist, or has not been modified for apredetermined period of time), the indicator may be set based uponbiometric information. This could be weight, height, body mass index(BMI), fat content, muscle mass or any other physiological or biometricinformation, but is preferably weight.

Preferably the processor of the system or bike sets the resistance levelindicator of the user based on the user's biometric informationaccording to a look-up table. This is a convenient and accurate way ofassociating a resistance level indicator to particular biometricinformation.

Preferably, the information about one or more users further comprises,for each user, a counter indicative of the number of exercises completedby the user. This enables the system or bike to keep track of how manyexercises have been performed previously so as to judge (for example)whether or not to set a resistance level indicator based on biometricinformation, or to determine whether or not modify an existingresistance level indicator based on a performance parameter.

For instance, the processor may be configured to set the resistancelevel indicator of the user based on the user's biometric informationonly when the counter is equal to or below a threshold value, such as 2.In that case, the processor will set the resistance level indicatorbased on a biometric information for the first three exercises (when thecounter is at 0, 1 and 2), but not afterwards. It may be possible toreset the counter if, for example, the user has not exercised for apredetermined period of time.

Optionally, the processor may be configured to apply a multiplier to thebiometric information according to the value of the counter. Thisenables the resistance level indicator to be set as a proportion of itslook-up table value, which is helpful in certain circumstances. Forinstance, whist the user is getting used to the exercise, it is helpfulto provide ‘ramp up rides’ to build the user up to the final look-uptable value.

For instance, the processor may be configured to: apply a multiplier of0.6 to the biometric information when the counter is equal to 0; and/orapply a multiplier of 0.8 to the biometric information when the counteris equal to 1; and/or apply a multiplier of 1 to the biometricinformation when the counter is equal to 2.

The system or bike need not only transmit and receive a resistance levelindicator. For instance, the processor may be further configured totransmit to the exercise apparatus (or receive from the control system)instructions for implementing an exercise protocol. An exercise protocolis a well understood fitness programme to be carried out on a piece ofequipment. The protocol comprises a plurality of periods of a certainduration, during which different qualities of exercise are implemented.For instance, the protocol may include first and second sprint periods,during which the user should sprint. Other qualities of exercise includegradients, speeds, weight, and so on.

The protocol preferably comprises applying at least two differentresistance levels during the plurality of periods. Optionally, theresistance level remains constant throughout any period.

An exemplary protocol consists of: a warm up period, followed by a firstsprint period, followed by a first recovery period, followed by a secondsprint period, followed by a second recovery period.

Preferably in such a protocol, the duration of the warm-up period is 180seconds; the duration of the first sprint period is 20 seconds; theduration of the first recovery period is 180 seconds; the duration ofthe second sprint period is 20 seconds; and the duration of the secondrecovery period is 180 seconds.

In a particularly preferred embodiment, the resistance level appliedduring the first and/or second sprint periods is based on the resistancelevel indicator. In other words, the resistance which is set by theresistance level indicator stored by the control system or the bike isused only during one or both ‘sprint’ periods, where the user is workinghardest during the whole exercise.

For instance, a first resistance level is applied during the warm upperiod; a second resistance level is applied during the first sprintperiod; the first resistance level is applied during the first recoveryperiod; the second resistance level is applied during the second sprintperiod; and the first resistance level is applied during the secondrecovery period.

The first resistance level may be zero, or may be a non-zero level whichis the lowest resistance setting of the exercise apparatus.

The performance parameter is preferably a ratio of a first performancemeasurement to a second performance measurement, wherein the first andsecond performance measurements are taken at different times during anexercise. In this way, the performance parameter acts as a measurementof how quickly and by how much a user's performance worsens over time(i.e. how much harder a user is finding the exercise at differentstages). Thus, the first performance measurement is preferably takenbefore the second performance measurement.

Preferably, the first and second performance measurements are takenduring the second sprint period, which is the optimal time for theuser's performance to be measured, since the user is most likely toexhibit his or her most significant worsening of performance during thisperiod.

Preferably the first performance measurement is taken 5 seconds into thesecond sprint period, and more preferably the second performancemeasurement is taken 15 seconds into the second sprint period. Hence,where the second sprint period is 20 seconds long, the user'sperformance is measured 5 seconds into the sprint (when the user wouldbe performing comparatively well) and 5 seconds from the end of thespring (when the user would be performing comparatively poorly).

The processor is preferably configured to compare the receivedperformance parameter with one or more threshold values to determinewhether or not to modify the resistance level indicator. For instance,where the performance parameter is a ratio, there may be an upperthreshold (of 0.75, for instance), above which the processor causes theresistance level indicator to be increased. In other words, if theperformance of the user does not drop by at least 25% over the twomeasurements, the resistance level of the user's next exercise will begreater.

In such an optional embodiment, the processor may be further configuredto compare the received performance parameter with an upper thresholdvalue, and to increase the resistance level indicator if the receivedperformance parameter exceeds the upper threshold values.

Likewise, there may be a lower threshold (of 0.5, for instance), belowwhich the processor causes the resistance level indicator to bedecreased. In other words, if the performance of the user drops by morethan half across the two measurements, the resistance level of theuser's next exercise will be less.

In such an optional embodiment, the processor may be further configuredto compare the received performance parameter with a lower thresholdvalue, and to decrease the resistance level indicator if the receivedperformance parameter is below the lower threshold value.

The processor may be further configured to compare the receivedperformance parameter with an upper threshold value and a lowerthreshold value, and to maintain the resistance level indicator if thereceived performance parameter is between the upper and lower thresholdvalues.

Upon reaching a determination to modify the resistance level indicator,the processor may be configured to modify the resistance level indicatorby a predetermined amount. This could be fixed in all cases, or vary,depending on the preferred implementation. For instance, the amount bywhich the resistance level indicator is modified could depend on themagnitude of the performance parameter; it could be modified by arelatively large amount if the performance parameter is very positive ornegative, for example, and modified by a relatively small amount if theperformance parameter is only slightly positive or negative.

In the case where the performance parameter exceeds the aforementionedupper threshold, the processor may be configured to increase theresistance level indicator by said predetermined amount (optionallydepending on magnitude of the performance parameter) and in the casewhere the performance parameter falls below the aforementioned lowerthreshold, the processor may be configured to reduce the resistancelevel indicator by said predetermined amount (optionally, again.depending on magnitude of the performance parameter).

The resistance level indicator may be a value between 0 and 255. This isparticularly advantageous since it can be stored using just 8-bits ofinformation, which is convenient for data processing. In this case, thepredetermined amount by which the level may vary is 1 (i.e. 1/256th ofthe total range of resistance), although it could be 2, 5, 10 or anynumber.

The performance parameter may optionally include the heart rate of auser. The heart rate can be monitored by suitable components on the bikeor control system, and the respective processor may be furtherconfigured to cause the communication subsystem to transmit an alert tothe exercise apparatus (or display a warning on or cease operation ofthe exercise apparatus) if the heart rate exceeds a predeterminedthreshold. This enables suitable safety precautions to be implemented onthe exercise equipment.

Preferably, the exercise apparatus is an exercise bike, in which caseperformance parameter is preferably revolutions per minute RPM. Exercisebikes are particularly convenient for practising HIT, and RPM can beused to calculate power, which is the best measure for optimisingperformance.

Preferably the data interrogation subsystem or user identity subsystemof the exercise apparatus further comprises one or more of a dock forreceiving a removable storage device; a card reader for receiving anidentity card; and an electronic login system for accepting anelectronic login. Other means for supplying identity information,including a user identifier are also possible.

Where the exercise apparatus calls for memory on which to store aresistance level indicator, the memory may form part of a removablestorage device insertable into the dock by the user.

The exercise apparatus may be configured such that the processor causesthe apparatus to be inoperable until the processor receives a valid useridentifier from the user. For instance, the processor could cause thebrake to apply so great a resistance to the load that the apparatus is‘locked’, until valid credentials have been supplied.

Preferably the resistance applied by the brake during exercise is notadjustable by the user during exercise. Whilst the user may have accessto an emergency stop to cease exercise altogether (by applying enoughresistance to stop the load from moving altogether, for instance)adjustment of the resistance mid-exercise is ideally prohibited toensure the user completes the HIT as intended. Thus, the equipment issuperior to general purpose equipment often found in gyms, for example,which are often not used as effectively as they could be.

Optionally, the resistance applied by the brake during exercise iscontrollable only by the resistance level indicator stored in thememory.

Preferably the exercise apparatus further comprises a screen at leastpartially enclosing the apparatus to enable the user to exercise with asuitable degree of privacy. The exact configuration of the screen willdepend on the preferred implementation, but it could be separate from orintegral with the exercise equipment.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the invention will now be described in detail, withreference to the accompanying drawings, in which:

FIG. 1 shows a schematic of a control system according to an embodimentof the first aspect of the invention in communication with a pluralityof bikes according to the second aspect of the invention;

FIG. 2 shows a schematic of one of the exercise apparatuses shown inFIG. 1;

FIGS. 3A to 3J show screenshots of a display of the exercise apparatusshown in FIG. 2 during an exercise;

FIG. 4 shows a flow diagram of a method of operating the control systemand exercise equipment shown in FIG. 1;

FIG. 5 shows a schematic of an exercise apparatuses according to a thirdaspect of the invention;

FIG. 6 shows a flow diagram of a method of operating the exerciseequipment shown in FIG. 5;

FIG. 7 shows the exercise apparatus shown in FIG. 6 partially enclosedby a screen.

DETAILED DESCRIPTION OF THE INVENTION

The embodiments below are exercise bikes, which are found to beparticularly effective at delivering HIT. It will be understood,however, that the invention is not limited only to exercise bikes, andmay be applied to alternative forms of exercise apparatus, such asrowing machines, elliptical machines or X trainers, climbing machines,stair machines, or any apparatus where a resistance is applied and canbe varied, and where performance is measurable.

FIG. 1 shows a schematic of a control system 101 of the first aspect ofthe invention. The control system comprises a processor 103, acommunication subsystem 105, and a memory 107.

The control system 101 is in communication with a plurality of exercisebikes 200 a-200 c across a network 109, via the communication subsystem105. The network is a wide area network (WAN) wherein the plurality ofexercise bikes 200 a-200 c communicate with the control system 101wirelessly, but the network could be a local area network (LAN), andeach of bikes 200 a-200 c may be wired to the control system 101 orcommunicate with the control system 101 wirelessly, and may use anyknown communication protocol such as email, http, ftp, over anytransmission medium including Bluetooth, GPRS, 3G or 4G.

The memory 107 is a hard disk, but may be any suitable memory forstoring data. The memory 107 is configured to store user data, includinginformation about a plurality of users of the exercise equipment. Thisinformation includes, for each user, identity information including auser identifier which is unique to the user to enable the user to beidentified. The identity information may also include name, address,gender, age, and any other information which is desirable to recordabout the user. The information further includes, for each user,biometric information including the weight of the user. The biometricinformation may also include muscle mass, percentage of fat, watercontent, height, body mass index (BMI), and any other biometricinformation which is desirable to record about the user. The informationfurther includes, for each user a resistance level indicator which setsthe resistance level to be applied by the exercise bikes for that user(as described below). The information may further include additionaldetails of exercise protocols to be implemented by the exercise bikes,depending on the preferred implementation.

FIG. 2 shows a schematic of one of the exercise bikes 200 shown in FIG.1, and according to the second aspect of the invention.

The exercise bike may be a commercially available exercise bike suitablefor sprint training (such as the X-1000 bike manufacture by Trixter™, orthe Spinner™ NXT bike manufactured by StarTrac™, for example), but anysuitably modified conventional exercise bike will suffice. A skilledperson is familiar with the arrangements of such readily availableexercise bikes and so no further description is required here.

In other embodiments, the exercise bike may be designed specifically forHIT protocols. Such a bike may have a number of bespoke components. Forinstance, the bike frame structure may be engineered to withstand highintensity exercises reaching power outputs of 1,500 watts and above.Conventional frames are designed for maximum power outputs of 800 watts.The bike may be provided with a magnetic brake system with motorcontrolled magnet position. Such a system allows resistance to beincreased rapidly—within 1 second, for example, which is beneficial forHIT exercise protocols. Conventional motor-driven magnetic brake systemsare not able to adjust brake resistance so rapidly. The bike may beprovided with a toothed belt, which avoids the risk of slippage oftransmission from crank pulley to flywheel at high power outputs.Conventional belt-driven exercise bikes use poly-V belts, which wouldslip at power output levels of about 1,000 watts and above whenresistance is applied suddenly.

The exercise bike comprises computing means 210 in the form of a tabletcomputer (although other means are possible). The tablet comprises aprocessor 201, a communication subsystem 203, an identificationsubsystem 205 and a display 207.

The exercise bike further comprises a load 209 in the form of aflywheel, which the user rotates by applying force to pedals, as iswell-understood. The exercise bike further comprises a brake 211 forapplying resistance to the flywheel to varying the force which the usermust apply to the pedals to rotate the flywheel. The brake 211 acts onthe flywheel 209 to increase the effort required for a user to rotatethe flywheel 209. The brake is configured to apply resistance rangingfrom no resistance to a maximum resistance such that the flywheel islocked from rotation. The brake physically contacts the flywheel toimpart resistance, but any other suitable arrangement may be provided,such as hydraulic or magnetic braking systems. Where the exerciseequipment is not a bike, a skilled person will understand thatequivalent loads and brakes for applying resistance to the load can beimplemented.

The exercise bike further comprises a measurement subsystem 213configured to measure a performance parameter of the user on theapparatus, in this case the revolutions of the flywheel or pedals perminute (RPM). Measurement of other performance parameters (such as forceapplied to the pedals, heart rate, etc.) is also possible.

Coupled to the computing means 210 of the bike 200 is a biometric scale215. The user's biometric information may be obtained using the scale,which may be sent to the computing means. A suitable biometric scalewhich is available commercially is the Tanita SC-240 body compositionanalyser, although any suitable scale may be used. Any other suitablemeans for receiving, measuring, or otherwise gleaning biometricinformation from the user may be used in addition to or in replacementof the biometric scale. Preferably, the scale or other means is able toobtain one or more of the following pieces of biometric data: weight,muscle mass, percentage of fat, water content, height, body mass index(BMI).

The identification subsystem comprises a dock 217 for receiving a keyfob inserted by a user containing that user's user identifier in theform of an alphanumeric code stored on the fob. It will be appreciatedthat the user identifier could take other forms. For instance, thetablet computer may be adapted to permit a user to provide the useridentifier to log-in to the exercise bike system to begin an exercise.Users may be prompted to identify themselves by inputting a usernameand/or password; by the use of an RFID chip; a smartphone app; afingerprint; a removable memory device; or any other variety of standardmethods of such, as will be well understood by the skilled person.

However the user identifier is received, the processor 201 causes thecommunication subsystem 203 to transmit the user identifier to thecontrol system 101 across the network 109. The user identifiercorresponds to a user identifier stored in memory 107, and the controlsystem is thus able to access the information associated with that user.

The processor 201 is coupled to the brake 211 to cause the brake 211 toapply a resistance to the flywheel 209. With the exception of safetycontrols such as an emergency stop, the user is unable to manuallyadjust the resistance applied by the brake 211 to the flywheel 209manually or to control the processor so as to cause it to adjust theresistance. Additionally, the processor is configured to apply aresistance to prevent the bike from being operated (i.e. to prevent theflywheel from rotating) without a registered user being logged in to thesystem.

The processor is coupled to the measurement subsystem 213, whichincludes at least one sensor (not shown) for sensing RPM. For example,one or more sensors may be positioned on the frame adjacent the flywheelto sense flywheel rotation speed; one or more sensors may be positionedon the frame adjacent the pedals to sense cadence. All such sensorscould be arranged by a skilled person as necessary to determineperformance of the user during an exercise.

In preferred implementations, the processor may be adapted to measure orreceive, compute and display cadence, power, pedal pressure, heart rate,and timing during an exercise. The heart rate may be measured via one ormore electrodes located at the handle bar, or wirelessly via a wrist orchest strap capable of measuring heat rate. The processor may cause thedisplay 207 to show the measured performance parameters, and also toshow instructions to users during the HIT exercise, as explained in moredetail below with reference to FIGS. 3A to 3J.

In use (and with reference to the process illustrated in FIG. 4), thecontrol system 101 and exercise bike 200 operate as follows. A usermounts the bike (step 410) and provides the exercise bike 200 with hisor her user identifier (step 403) in the form of a key fob (not shown)inserted into the dock 217. The bike processor 201 interrogates the foband receives the user identifier (step 405), and then causes thecommunication subsystem 203 to transmit the user identifier to thecontrol system 101 across the network 109 (step 407).

The user identifier is received at the communication subsystem 105 ofthe control system 101 (step 409) and the control system processor 103processes the received user identifier (step 411), and interrogates thememory 107 (step 413) to retrieve information about the usercorresponding to the user identifier (step 415). This informationincludes, at least, a resistance level indicator (step 417).

The control system processor 103 then processes the resistance levelindicator (step 417) and causes the communication subsystem 105 totransmit the resistance level indicator associated with that user to thebike from which the corresponding user identifier was received (step419).

The resistance level indicator is received at the communicationsubsystem 203 of the bike 200 (step 423) and, at some point during theuser's exercise, the bike processor 210 causes the brake 211 to apply alevel of resistance to the flywheel according to the resistance levelindicator (as explained in more detail below).

During the user's exercise, the bike processor 210 causes themeasurement subsystem to measure a performance parameter of the user,including at least the RPM. The bike processor 210 then causes thecommunication subsystem to transmit the performance parameter to thecontrol system 101 across the network 109 (step 425).

The performance parameter is received at the communication subsystem 105of the control system 101 and the control system processor 103 carriesout a computation (described in more detail below) to determine whetheror not to modify the resistance level indicator based on the receivedperformance parameter. If the determination is positive, the processormodifies the resistance level indicator stored in memory (step 427).

Determination of whether to modify the resistance level indicator takesplace once per exercise, and not continuously during the exercise. Thus,where the resistance level indicator stored in memory is modified basedon the performance parameter measured during one exercise, the modifiedresistance level indicator will be used to set the resistance applied bythe brake for the next exercise.

The control system 101 and bike 200 are configured such that a user'sexercise is performed according to an exercise protocol. Either theprotocol can be entirely configured by the control system 101 andtransmitted to the bike 200 along with the resistance level indicator,or the protocol can be preconfigured to some extent such that certaininvariable aspects are stored on the bike, whilst variable aspects(including the resistance level indicator) are transmitted from thecontrol system 101 to the bike.

A protocol is defined by a plurality of periods of a certain duration,during which different qualities of exercise are implemented. Forinstance, the protocol may include first and second sprint periods,during which the user should sprint. Other qualities of exercise includegradients, speeds, weight, and so on. A preferred protocol is asfollows:

-   -   1. a warm up period of 180 seconds where a first resistance        level is applied; followed by    -   2. a first sprint period of 20 seconds where a second resistance        level is applied, the second resistance level being based on the        resistance level indicator associated with the user; followed by    -   3. a first recovery period of 180 seconds where the first        resistance level is applied again; followed by    -   4. a second sprint period of 20 seconds where the second        resistance level is applied again; followed by    -   5. a second recovery period where the first resistance level is        applied for the final time.

In this case, the exercise bike 200 is preconfigured to implement thefive different periods of the specified duration, and is furthermorepreconfigured to apply the first resistance level (of low or zeroresistance) during the warm up, and first and second recovery periods.The only information not preconfigured on the exercise bike 200 is thesecond resistance level that is based on the resistance level indicatorassociated with the user, which is received from the control system 101.However, other embodiments may use different preconfigurations on theexercise bike 200, and configure the control system 101 to transmit anyinformation not so preconfigured.

The above protocol is an example of a preferred protocol, where theresistance level indicator defines the second resistance level (i.e. theresistance level used during the high intensity sprint sections of theHIT protocol). It will be understood that other protocols may be used.For example, the number and duration of the sprint and recovery periodsmay be changed; different resistance levels may be used for differentsprints; a constant resistance level may be used for the whole protocol;or other such variations. Another option would be to have a protocolcomprising three 20-second sprints, or to have a protocol comprising30-second sprints. The first resistance level may be the lowestresistance setting of the exercise apparatus, or some other low valuesuch that it does not cause undue exertion to the user.

The HIT protocols may differ depending on the weight of the user (orother biometric user information such as muscle mass, BMI, height,etc.). Alternatively, the same format of HIT protocol (i.e. with thesame timings of the high and lower intensity sections of the protocol),may be suitable for all users.

If multiple HIT protocols are stored, the tablet may automaticallyselect the appropriate HIT protocol for an individual user based onbiometric user data. This could be the user's weight or alternativelyother biometric information such as the user's muscle mass, BMI, height,etc.

The control system and bike according to the invention optimise theresistance level indicator for each individual user. Thus, for theexemplary HIT protocol given above, the resistance level used during thehigh intensity sprint sections is optimised for each user. This is basedon a measured performance parameter of the user when performing the HITprotocol.

Whilst the user carries out the HIT protocol (whatever form it takes),and the exercise bike 200 measures a performance parameter (in theexemplary case, RPM) of the user. This parameter is then transmitted tothe control system 101 and used to determine whether or not to modifythe resistance level indicator of that user stored in the memory, asdescribed above.

A particularly preferred performance parameter is a ratio of twoperformance measurements taken at different times during the exercise.In the present case, the bike measures the RPM at two points in thesecond sprint and calculates a ratio of the second measurement to thefirst to provide a measure of the decrease in performance in that secondsprint period. The first measurement (RPM₅) is taken 5 seconds in to thesecond sprint period (i.e. 385 seconds in to the exercise according tothe above protocol) and the second measurement (RPM₁₅) is taken 15seconds in to the second sprint period (i.e. 395 seconds in to theexercise according to the above protocol). Based upon the twomeasurements the ratio RPM₁₅:RPM₅ is calculated.

Either the exercise bike 200 can transmit both performance measurements(RPM₅ and RPM₁₅) to the control system 101, or the exercise bike 200 cancalculate the aforementioned ratio and transmit that.

Upon receipt of the performance parameter (either the ratio orperformance measurements), the processor 103 of the control system 101determines whether or not to adjust the resistance level indicatorstored in memory 107 for that user by comparing the ratio to thresholdvalues and adjusting the resistance level indicators accordingly.

For instance, in the present case, the processor 103 applies thefollowing logic statements to the performance parameter:

-   -   if [RPM₁₅/RPM₅>X] then increase the resistance level indicator        by Z; else    -   if [RPM₁₅/RPM₅<Y] then reduce resistance level indicator by Z;        else    -   do not adjust the resistance level indicator

In the exemplary case, X is 0.75 and Y is 0.5, but these values may beadjusted or other values may be used instead.

In the exemplary case, the resistance level indicator takes values from0-255 and Z is 1, but these values may be adjusted or other values maybe used instead. For instance, Z may be a percentage of the currentresistance level indicator.

According to the algorithm above, if the user's performance during thesecond sprint decreases by less than 25% between 5 seconds and 15seconds (i.e. the resistance is too low such that the user does not haveto work hard enough to maintain their RPM to perform the exerciseadequately), then the resistance level indicator will be increased. Onthe other hand, if the user's performance during the second sprintdecreases by more than 50% between 5 seconds and 15 seconds (i.e. theresistance is too high for the user to maintain their RPM to perform theexercise adequately), then the resistance level indicator will bedecreased.

If the ratio falls between the values X and Y, then the resistance levelindicator is already optimised and remains unchanged. The values X, Y,and Z may be varied by the administrator of the exercise protocols andapparatus.

It will be understood that by applying the algorithm above, theresistance level of the exercise apparatus may be optimised for a userbased on the performance of the user. Algorithms alternative to the onedescribed above may be used without departing from this inventiveprinciple.

For example, the ratio of sprint RPMs may be calculated for the firstsprint, or at different times during the sprints. More than one ratiomay be taken, and compared to more than one value, or to a parameter.The absolute change in resistance may be increased or decreaseddepending on which value or parameter is met by which ratio.

It will be appreciated that in certain circumstances, it will not bepossible or appropriate for the control system 101 to rely on theresistance level indicator stored in the memory 107 for a particularuser. This could be, for instance, that the user is new to theequipment, in particular using the equipment for the first time.Alternatively this could be because the user has not used the equipmentfor a prolonged period of time, such as more than a month. In suchcases, the control system calculates a resistance level indicatorappropriate for the user, based on the user's biometric information, inparticular the user's weight.

The user may provide their biometric information in any conventionalmanner, such as entering it via the computing means 210 on the bike 200.Alternatively, the user may utilise biometric scales 215 to provide thedata.

In the exemplary case, the weight of the user is required to establishthe resistance level indicator. This is read from a look-up table thatlists resistance levels by given user weight. In an example, where theapparatus is an exercise bike with resistance levels from 0-255, asuitable look-up table is:

User Body Bike Resistance Weight (kg) (0-255) 20 66 21 66 22 66 23 66 2466 25 66 26 66 27 66 28 66 29 66 30 66 31 66 32 66 33 66 34 66 35 66 3666 37 66 38 66 39 66 40 66 41 66 42 66 43 66 44 66 45 66 46 66 47 66 4866 49 66 50 67 51 68 52 69 53 70 54 71 55 72 56 73 57 74 58 75 59 76 6077 61 78 62 80 63 83 64 85 65 88 66 90 67 93 68 95 69 98 70 100 71 10372 105 73 108 74 110 75 113 76 115 77 118 78 120 79 123 80 125 81 128 82130 83 133 84 135 85 138 86 140 87 143 88 145 89 148 90 150 91 153 92155 93 158 94 160 95 163 96 165 97 168 98 170 99 170 100 170 101 170 102170 103 170 104 170 105 170 106 170 107 170 108 170 109 170 110 170 111170 112 170 113 170 114 170 115 170 116 170 117 170 118 170 119 170 120170 121 170 122 170 123 170 124 170 125 170

Further biometric information may be used to establish the resistancelevel indicator, depending on the preferred implementation.

Give the intensity of HIT, it is preferable to provide a user who is newto the apparatus a number of initial “ramp-up” HIT protocols, tofamiliarise the user with the apparatus and the exercise regime withoutover-exerting the user. The resistance level indicator for theseprotocols may be lower than would ordinarily be the case according tothe circumstance described above, and increased stepwise until a desiredlevel is reached.

For instance, the processor may apply a multiplier of less than 1 to thebiometric information (e.g. weight) for the first few rides, such that auser is exposed to a lower resistance level than his or her body weightwould ordinarily justify. In the preferred example given below, theuser's body weight is multiplied by 0.6 for the purposes of looking upthe resistance level indicator from the look-up table for the firstride, and multiplied by 0.8 for the purposes of looking up theresistance level indicator from the look-up table for the second ride.

-   -   Ramp-up Ride 1:        -   Resistance level indicator from look-up table as per (Body            Weight×0.6)    -   Ramp-up Ride 2:        -   Resistance level indicator from look-up table as per (Body            Weight×0.8)    -   Ramp-up Ride 3:        -   Resistance level indicator from look-up table as per (Body            Weight×1.0)    -   Ride 4 (first ride after ramp-up)        -   Resistance level indicator from look-up table as per Body            Weight

Following the ramp-up rides, the resistance level indicator is thenalgorithmically optimised after subsequent iterations of the HITprotocol, as described below.

For instance, following the system described above, a person weighing 80kg would initially start with a resistance level indicator of 48 for thefirst ride, followed by a resistance level indicator of 85 for thesecond ride, followed by a resistance level indicator of 125 for thethird and fourth rides, followed by a resistance level indicatoradjusted according to the user's performance.

Since the exercise bikes 200 are intended for use without supervision,it is desirable to implement sophisticated safety monitoring routines.The exercise bike 200 and/or control system 101 according to the presentinvention may therefore also include real-time monitoring of the heartrate of the user during the HIT protocol. Heart rate monitoring could beperformed using a chest strap or heart rate sensors build in to theequipment, as is known. Monitoring of the heart rate could take place onthe exercise bike 200, or heart rate data could be transmitted from thebike 200 to the control system 101 such that monitoring can take placethere.

Based on the heart rate data, the exercise apparatus 200 may stop theprotocol if the heart rate falls outside predetermined thresholds,either by making such a determination itself or upon receipt of aninstruction to that effect from the control system 101.

Preferably, if the starting heart rate before the first sprint, heartrate after the first sprint, or heart rate on recovery between the firstand second sprints, exceeds various pre-set values described below, thenthe protocol is stopped. Information on the stopped protocol is alsosent to the administrator of the exercise protocols and apparatus, andthe user may be prevented from accessing the HIT apparatus until theadministrator has allowed access.

Preferably a heart rate value is obtained once per second during theexercise.

In the exemplary protocol described above, the safety routine mayoperate to stop the protocol if any of the following conditions are met:

-   -   Rule 1: Staring heart rate too high        -   If within the 3-minutes warm-up phase (seconds 1-180) there            is at least one period of sustained heart rate of 110 or            above for at least 30 seconds    -   Rule 2: Heart rate too high after 1st sprint        -   If the highest heart rate value during and after the first            sprint (i.e. within first sprint and the first 30 seconds of            the first recovery phase: seconds 181-230) is greater than            110% of the user's maximum heart rate for at least one            period of 30 seconds    -   Rule 3: Heart rate recovery after 1st sprint too poor        -   If heart rate toward the end of the first recovery period            (e.g. at second 370) is greater than 85% of the highest            heart rate value in seconds 181-230 (i.e. within first            sprint and the first 30 seconds of the first recovery phase)

Rule 3 only applies if the heart rate in the first recovery phase (i.e.up to 10 seconds before the second sprint starts: seconds 181 to 370)reaches 80% of the user's maximum heart rate.

For the purposes of the safety routines, the user maximum heart rate iscalculated as 220 less the user's age. This may be stored in the memory107.

Heart rate monitoring of the user may be imperfect due to the userbreaking contact with the heart rate monitoring device. Therefore theremay be some short gaps (a “no-val” cell), or longer gaps (a “hands-offperiod”, or HOP), or outlier values recorded. The apparatus and methodsof the invention may still function despite such breaks in heart-ratedata, as heart rate values can be interpolated or approximated for thesegaps. Furthermore, the heart rate may be smoothed during the protocol.

For instance, outlier values may be removed, the heart rate at a certaintime may be expressed as a five-second moving average, short gaps may befilled by writing forward the value preceding the noval cell, and HOPsmay be overcome by linear interpolation using the points before andafter the HOP. It is important to manage the imperfect monitoring of theheart rate so that the user can be shown their heart rate without anygaps that may alarm the user. Furthermore, according to the invention, ametric may be calculated using the heart rate.

An example of a smoothing and interpolation algorithm is as follows(where ‘HR(secX)’ is the adjusted heart rate value at second ‘X’ and‘RawValueHR(secX)’ is the measured heart rate value at second ‘X’:

-   -   Step 1: Set the first value for second 1 to 80    -   Step 2: Remove values which are deemed too low or too high:        -   During the warm-up phase (seconds 1-180): keep only those            heart rate values between 30<RawValueHR(secX)<120        -   During sprint 1 and recovery phases (seconds 181-380): keep            only those heart rate values between 50<RawValueHR(secX)<200        -   During sprint 2 and cooldown phases (seconds 381-580): keep            only those heart rate values between 50<RawValueHR(secX)<200    -   Step 3: Set HR(secX) according to a 5 seconds moving average:        HR(secX)=(RawValueHR(secX)+5*HR(sec(X−1)))/6    -   Step 4: Fill in short data gaps (including “no-val” cells)        -   For data gaps shorter than a predefined Hands-Off Period            (HOP) write forward last valid HR value        -   HR(secX)=HR(sec(X−1) if no valid RawValueHR(secX) available    -   Step 5: Hands-Off Periods (HOP)        -   Set HR(secX) to ‘null’ if X is within a designated HOP

FIGS. 3A to 3J are screen shots showing exemplary screens visible to auser on the display 207 of the exercise bike 200 during exercise. FIG.3A shows a log-in screen where a user is able to provide a useridentifier. In conjunction with the processor, the display 207 may befurther adapted to permit a user to register their details (name, email,password, age, gender etc.); administer a questionnaire to a user todetermine their health status; provide instructions to users operate theapparatus, including instructions to enable a user's biometric data tobe obtained (for example to weigh themselves on the biometric scale),and to receive, display, and store on the users' biometric data, eitheron the tablet computer or on the server to which the tablet computer isconnected.

The tablet may be adapted to provide visual information on the HITprotocol being performed and the performance of the user. Suchinformation is familiar to the skilled person, and may comprise one or acombination of: a start screen; the user's identification; a descriptionof the different sections of the protocol; a countdown of the time leftin a particular section of the protocol; a prompt to increase ordecrease intensity; the user's measured heart rate; the user's measuredperformance parameter; and a summary upon completion of the protocol.Examples of such information are given in FIGS. 3B-3J.

As shown in FIGS. 3H and 3I, for instance, the display may be show asummary of performance data during or after the HIT exercise. Theperformance data may include peak heart rate, % of peak heart rateversus maximum heart rate (for example, calculated as 220 minus theuser's age), maximum power output in Watts, a diagram with power outputover the course of the HIT exercise, a % time the user has exercised at90-100% of his peak power output (i.e. performance zone). Furthermore,the tablet may display a single metric designed to aid the user incomparing their performance from one iteration of an exercise protocolto another, and/or to allow users to compare themselves with each other.

The display may show a summary of performance data of all HIT exercisesconducted by the user over time. The performance data may include adiagram of peak power outputs, a diagram of % time spent in performancezone, diagrams of biometric data (fat mass, muscle mass, etc).

As shown in FIG. 3J the display may show feedback questions forobtaining information relating to the user's state of tiredness, forexample, and store the answers either on the tablet or on the server.

Each of the aforementioned displays may be shown sequentially (in anyorder) to the user, once the HIT protocol has finished.

The tablet or other computing means 210 may be adapted to provideauditory affirmations and binaural sounds via headphones to help theuser relax during low intensity intervals (meditative state) and/orprovide voice instructions during the HIT exercise.

FIG. 5 shows a schematic of an exercise bike 500 according to the thirdaspect of the invention. The exercise bike of FIG. 5 is identical to theexercise bike of FIG. 2, except that it is capable of implementing theinvention without communicating with a server.

The exercise bike comprises computing means 510 in the form of a tabletcomputer (although other means are possible). The tablet comprises aprocessor 501, a data interrogation subsystem 505 and a display 507.

As described previously with reference to the exercise bike of FIG. 2,the exercise bike of FIG. 5 further comprises a load 509 in the form ofa flywheel, and a brake 511 for applying resistance to the flywheel tovarying the force which the user must apply to the pedals to rotate theflywheel. The brake physically contacts the flywheel to impartresistance, but any other suitable arrangement may be provided, such ashydraulic or magnetic braking systems. Where the exercise equipment isnot a bike, a skilled person will understand that equivalent loads andbrakes for applying resistance to the load can be implemented.

As described previously with reference to the exercise bike of FIG. 2,the exercise bike of FIG. 5 further comprises a measurement subsystem513 configured to measure a performance parameter of the user on theapparatus, in this case the revolutions of the flywheel or pedals perminute (RPM). Measurement of other performance parameters (such as forceapplied to the pedals, heart rate, etc.) is also possible.

Coupled to the computing means 510 of the bike 500 is a biometric scale515. As described previously with reference to FIG. 2, the user'sbiometric information may be obtained using the scale, which may be sentto the computing means.

The data interrogation means 505 comprises a dock 517 for receiving akey fob inserted by a user with a memory containing that user'sresistance level indicator. However, it will be appreciated that theresistance level indicator could take other forms. For instance, thetablet computer may be adapted to provide their resistance levelindicator by the use of an RFID chip; a mobile app; a removable memorydevice; or any other variety of standard methods of such, as will bewell understood by the skilled person.

Alternatively, the computing means itself may further comprises a memory(not shown) which stores resistance level indicators for a plurality ofusers in much the same way as control system 101 shown in FIG. 1. Inthis case, the computing means will further comprise an identificationsubsystem (not shown) which is configured to permit a user to provide auser identifier to log-in to the exercise bike system to begin anexercise. Users may be prompted to identify themselves by inputting ausername and/or password; by the use of an RFID chip; a smartphone app;a fingerprint; a removable memory device; or any other variety ofstandard methods of such, as will be well understood by the skilledperson and described in detail in connection with the embodiment ofFIGS. 1 and 2.

As described previously with reference to the exercise bike of FIG. 2,the processor 501 of the exercise bike of FIG. 5 is coupled to the brake511 to cause the brake 511 to apply a resistance to the flywheel 509.With the exception of safety controls such as an emergency stop, theuser is unable to manually adjust the resistance applied by the brake511 to the flywheel 509 manually or to control the processor so as tocause it to adjust the resistance. Additionally, the processor isconfigured to apply a resistance to prevent the bike from being operated(i.e. to prevent the flywheel from rotating) without a registered userbeing logged in to the system.

As described previously with reference to the exercise bike of FIG. 2,the processor 501 of the exercise bike of FIG. 5 is coupled to themeasurement subsystem 513, which includes at least one sensor (notshown) for sensing RPM. For example, one or more sensors may bepositioned on the frame adjacent the flywheel to sense flywheel rotationspeed; one or more sensors may be positioned on the frame adjacent thepedals to sense cadence. All such sensors could be arranged by a skilledperson as necessary to determine performance of the user during anexercise.

In use (and with reference to the process illustrated in FIG. 6), theexercise bike 500 operates as follows. A user mounts the bike (step 601)and provides the exercise bike 600 with his or her user identifier (step603) in the form of a key fob (not shown) inserted into the dock 517. Itwill be appreciated that this step is optional, however, and the usercould instead simply provide a key fob (or equivalent) containing theresistance level indicator. Where a user identifier is provided, theprocessor 501 interrogates the fob and receives the user identifier(step 605), and then interrogates the memory (step 607) to retrieveinformation about the user corresponding to the user identifier. Thisinformation includes, at least, a resistance level indicator (step 609).

At some point during the user's exercise (step 611), the bike processor501 causes the brake 511 to apply a level of resistance to the flywheelaccording to the resistance level indicator (as explained in more detailabove in connection with the exercise bike of FIG. 2).

At some point during the user's exercise, the bike processor 501 causesthe measurement subsystem to measure a performance parameter of theuser, including at least the RPM (step 613).

The bike processor 501 carries out a computation (described in moredetail above in connection with the exercise bike of FIG. 2) todetermine whether or not to modify the resistance level indicator basedon the received performance parameter. If the determination is positive,the processor modifies the resistance level indicator stored in memory(step 615), irrespective of whether the memory is within the exercisebike (and accessed using a user identifier) or provided by the user inthe form of a key fob, for example.

Determination of whether to modify the resistance level indicator takesplace once per exercise, and not continuously during the exercise. Thus,where the resistance level indicator stored in memory is modified basedon the performance parameter measured during one exercise, the modifiedresistance level indicator will be used to set the resistance applied bythe brake for the next exercise.

In all other respects (in particular with reference to the protocols andalgorithms for determining whether or not to modify the resistance levelindicator), the exercise bike of FIG. 5 operates the same as the controlsystem and exercise bike of FIGS. 1 and 2, except that all processingtakes place at the bike, rather than across a distributed network.

FIG. 7 shows an exercise bike 200 further comprising a screen 601 atleast partially enclosing the bike. HIT requires users to exercise attheir peak performance levels. The screen 601 enables HIT to be muchmore accessible and convenient for a broad range of users. Inparticular, the screen 601 enables exercise bikes to be placed inlobbies and cafeterias of office buildings, for example, or in publicareas in retail outlets and shopping centres, for example, or othersimilarly public places.

The screen 601 comprises a plurality of slats 602 interconnected to forma free-standing structure which mostly (i.e. at least partially)surrounds the exercise bike 200. At least some of the slats are orientedat an angle to the horizontal, so as to at least partially block abystanders view of the user and exercise apparatus. However, in otherembodiments the screen may be any structure capable of at leastpartially concealing a user and the exercise apparatus.

The screen 601 provides users with a minimum level of privacy, and whichhas been specifically designed to minimise the spacerequirement/footprint of the system. The screen 601 may be equipped witha number of additional features, such as an integrated ventilation andcooling system, an integrated biometric scale, integrated userinterfaces such as a display (as an alternative to the display attachedto the exercise bike directly), a smartcard or keyfob reader, asurveillance and alarm system, which together with the flywheel lockingmechanism, all of which are described above. The screen would thus giveour system multiple-user capabilities for unsupervised use in publicareas.

Accordingly to the above, this invention provides for exercise apparatusand control systems thereof that are specifically designed to make iteasier for a user to correctly carry out an HIT protocol. The user onlyhas to identify themselves, and then focus on performing the HITprotocol correctly. The resistance level for the individual user duringthe high intensity sections of the HIT protocol is optimised such thatthe user is working at the correct intensity, enabling the user to seethe full benefit of this form of exercise. This is achieved byalgorithmically optimising the resistance level over time, using themeasured performance parameter of the user as the input. This mean thatthe user is working at or near their maximum power output, and theresistance level will self-adjust as the fitness level of the userchanges.

While certain preferred embodiments of the invention have been describedhere, it will be apparent that modifications and variations of theseembodiments may be made without changing the scope of the invention.

The invention claimed is:
 1. A control system for controlling one ormore of a plurality of exercise apparatuses across a network, each ofthe plurality of exercise apparatuses comprising a brake for applyingresistance and being configured to transmit a user identifier and aperformance parameter of a user, the control system comprising: aprocessor; a communication subsystem configured to communicate with theplurality of exercise apparatuses across the network; and a memory forstoring information about one or more users, the information comprising,for each user: identity information, including a user identifier;weight; and a resistance level indicator; wherein upon receipt of a useridentifier from one of the one or more of the plurality of exerciseapparatuses in the network, the processor is configured to identify aresistance level indicator stored in the memory corresponding to theuser identifier; wherein, if the user is using the one or more of theplurality of exercise apparatuses for the first time, the processor isconfigured to set the resistance level indicator appropriate for theuser based on the user's weight; wherein the processor is configured tocause the communication subsystem to transmit the resistance levelindicator for that user to the one of the one or more of the pluralityof exercise apparatuses in order that a resistance is applied by a brakeof the one of the one or more of the plurality of exercise apparatusesaccording to the resistance level indicator, wherein the resistanceapplied by the brake during exercise is controllable only by theresistance level indicator stored in the memory, and wherein theresistance applied by the brake during exercise is not adjustable by theuser during exercise; wherein upon receipt of a performance parameter ofthe user measured on the one of the one or more of the plurality ofexercise apparatuses during the user's exercise in the network, theprocessor is configured to determine, based on the received performanceparameter, whether or not to modify the resistance level indicator ofthat user stored in the memory; wherein, if the determination ispositive, the processor is configured to modify the resistance levelindicator stored in the memory, wherein the modified resistance levelindicator will be used to set a resistance applied by a brake of one ofthe one or more of the plurality of exercise apparatuses for a nextexercise.
 2. The control system of claim 1, wherein the processor isfurther configured to set the resistance level indicator of the userbased on the user's weight according to a look-up table.
 3. The controlsystem of claim 1, wherein the information about one or more usersfurther comprises, for each user, a counter indicative of the number ofexercises completed by the user; optionally wherein the processor isconfigured to set the resistance level indicator of the user based onthe user's weight only when the counter is equal to or below a thresholdvalue; optionally wherein the threshold value is
 2. 4. The controlsystem of claim 2, wherein the processor is configured to apply amultiplier to the weight according to the value of the counter;optionally wherein the processor is configured to: apply a multiplier of0.6 to the weight when the counter is equal to 0; and/or apply amultiplier of 0.8 to the weight when the counter is equal to 1; and/orapply a multiplier of 1 to the weight when the counter is equal to
 2. 5.The control system of claim 1, wherein the processor is furtherconfigured to transmit to the one of the one or more of the plurality ofexercise apparatuses instructions for implementing an exercise protocol,wherein the protocol comprises a plurality of periods including firstand second sprint periods; optionally wherein the protocol comprisesapplying at least two different resistance levels during the pluralityof periods.
 6. The control system of claim 5, wherein the protocolconsists of: a warm up period, followed by a first sprint period,followed by a first recovery period, followed by a second sprint period,followed by a second recovery period; optionally wherein: the durationof the warm-up period is 180 seconds; the duration of the first sprintperiod is 20 seconds; the duration of the first recovery period is 180seconds; and/or wherein the resistance level applied during the firstand/or second sprint periods is based on the resistance level indicator.7. The control system of claim 6, wherein: a first resistance level isapplied during the warm up period; a second resistance level is appliedduring the first sprint period; the first resistance level is appliedduring the first recovery period; the second resistance level is appliedduring the second sprint period; and the first resistance level isapplied during the second recovery period; optionally wherein the firstresistance level is the lowest resistance setting of the one of the oneor more of the plurality of exercise apparatuses.
 8. The control systemof claim 1, wherein the performance parameter is a ratio of a firstperformance measurement to a second performance measurement, wherein thefirst and second performance measurements are taken at different timesduring an exercise.
 9. The control system of claim 8, wherein the firstperformance measurement is taken before the second performancemeasurement.
 10. The control system of claim 9, wherein wherein thefirst and second performance measurements are taken during the secondsprint period; optionally wherein the first performance measurement istaken 5 seconds into the second sprint period; and/or wherein the secondperformance measurement is taken 15 seconds into the second sprintperiod.
 11. The control system of claim 1, wherein the processor isfurther configured to compare the received performance parameter withone or more threshold values to determine whether or not to modify theresistance level indicator Optionally wherein the processor is furtherconfigured to compare the received performance parameter with an upperthreshold value, and to increase the resistance level indicator if thereceived performance parameter exceeds the upper threshold values;and/or wherein the processor is further configured to compare thereceived performance parameter with a lower threshold value, and todecrease the resistance level indicator if the received performanceparameter is below the lower threshold value; and/or wherein theprocessor is further configured to compare the received performanceparameter with an upper threshold value and a lower threshold value, andto maintain the resistance level indicator if the received performanceparameter is between the upper and lower threshold values.
 12. Thecontrol system of claim 1, wherein upon reaching the determination tomodify the resistance level indicator, the processor is configured tomodify the resistance level indicator by a predetermined amount.
 13. Thecontrol system of claim 12, wherein one of the one or more of theplurality of exercise apparatuses is an exercise bike, and wherein theperformance parameter is revolutions per minute RPM.
 14. A method forcontrolling one or more of a plurality of exercise apparatuses across anetwork, each of the plurality of exercise apparatuses comprising abrake for applying resistance, the method comprising: receiving a useridentifier of a user from one of the one or more of the plurality ofexercise apparatuses; retrieving a resistance level indicatorcorresponding to the user identifier from a memory; if the user is usingthe one or more of the plurality of exercise apparatuses for the firsttime, setting the resistance level indicator appropriate for the userbased on the user's weight; transmitting the resistance level indicatorto the one of the one or more of the plurality of exercise apparatusesin order that a resistance is applied by a brake of the one of the oneor more of the plurality of exercise apparatuses according to theresistance level indicator, wherein the resistance applied by the brakeduring exercise is controllable only by the resistance level indicator,and wherein the resistance applied by the brake during exercise is notadjustable by the user during exercise; receiving a performanceparameter of the user measured on the one of the one or more of theplurality of exercise apparatuses; determining, based on the receivedperformance parameter, whether or not to modify the resistance levelindicator; and, if the determination is positive: modifying theresistance level indicator corresponding to the user identifier in thememory, wherein the modified resistance level indicator will be used toset a resistance applied by a brake of one of the one or more of theplurality of exercise apparatuses for a next exercise.
 15. An exerciseapparatus and a control system, wherein the exercise apparatus iscontrolled by the control system, wherein the control system is asdefined of claim 1, wherein the exercise apparatus is configured tocommunicate with the control system across a network, the control systembeing configured to transmit a resistance level indicator indicative ofa resistance level to be applied by the exercise apparatus, the exerciseapparatus comprising: a processor; a communications subsystem configuredto communicate with the control system across the network; anidentification subsystem configured to receive a user identifier from auser; a load for use in exercise and a brake for applying resistance tothe load; and a measurement subsystem configured to measure aperformance parameter of the user on the apparatus; wherein upon receiptof a user identifier from a user, the processor is configured to causethe communication subsystem to transmit the user identifier to theremote server across the network; wherein upon receipt of a resistancelevel indicator from the control system, the processor is configured tocause the brake to apply a corresponding resistance to the load, whereinthe resistance applied by the brake during exercise is not adjustable bythe user and wherein the resistance applied by the brake during exerciseis controllable only by the received resistance level indicator; andwherein upon measurement of a performance parameter of the user on theapparatus, the processor is configured to cause the communicationsubsystem to transmit to the control system the performance parameter ofthat user.